Machine for blackleading the molds for electrotypes



(No Model.) 2 Sheets-Sheet 1.4

W. MILES..

MACHINE FUR BLAGKLEADING THE MOLDS POR ELBGTROTYPES. 180.405.585. Patented June 18, 1889.l

| v I Ir--urf-f-w A .z :n I ,j L 1 HH "IS i Ih hill' f mln, m I Ki #c f' 4 f 7"" i v: G: 'L lI y f #l G e 1 f,|f|mm E' t I n :K i n, E Q s HHHHIIIII'HIHIMIHHWHI. l r 'l .bij;;`"'g;gf" 1 f E I f C' *TZL J7 I w3 VWM Invenor,

da@ @eige mnuluuu .Lun .uununuunuluu' .1.1113 muuu .tun LJJLULILULlrL.

No. 405,585. lPatented June 18, 1889-.v

UNITED STATES PATENT @Erica IVARREN MILES, OF VARNERVILLE, MASSACHUSETTS.

MACHINE FOR BLACKLEADING THE MOLDS FOR ELECTROTYPES.

SPECIFICATION formingpart of Letters Patent No. 405, 585, dated June 18, 1889.

Application filed September 17, 1888. Serial No. 285,599- (No model.)

.To all whom t may 0072067171,.-

Be it known that I, VARREN MILES, a citizen of the United States, residing at Warnerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Machines for Blackleading the Molds for Flectrotypes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to' make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which forni a part of this specification.

Figure l is a vertical and longitudinal section, Fig. 2 a horizontal section, and Fig. 3 a vertical and transverse section, of a machine made in accordance with my invention for coating with black-lead the molds for electrotypes. Fig. 4 is a vertical section, and Fig. 5 a horizontal section, showing the way which a curved mold can be leaded in accordance with my invention.

The nature of my invention is defined in the claims hereinafter presented.

In the drawings, A denotes the case of the machine, which is shown as provided with three chambers B C D, the former or upper chamber B communicating with the chamber C by a conduit a and the chamber C with the chamber D by an opening b. Arranged in the upper chamber B is a carriage E, which is supported in ways c d, secured to the bottom and top of said chamber, and the said carriage is connected, as shown, to right and left screw-threads formed on a shaft F, sustained in bearings e in the ends of the case, and on one end said shaft is provided with a pulley f, partially around which and another pulley lined on a counter-shaft (not shown in the drawings) an endless belt g travels.

During the revolution of the shaft F the carriage has areciprocating rectilinear movement imparted to it.

The chamber B is provided with a door 71, to admit of access thereto, and it also has opening into it a conduit G, proceeding from a blast-blower II, arranged in the chamber D, as represented. Y

The driving-shaft of the blower projects outward through the case and has fixed on it a pulley I, partially about which and another pulley IiXed on the counter-shaft (hereinbe fore referred to) an endless belt J extends, Opening into the case of the blower is a pipe K, which communicates with a hopper L for holding the black-lead or plumbago in a finely-powdered state, and in the said pipe K are arranged two gates t 7.; for regulating the supply of the contents of thehopper to the blower. In case a continuous flow of the black-lead to the pipe K is desired, one of the gates is opened wide and the flow is regulated by the other gate; but if desired to gage the quantity to be admitted to the pipe K close the gate '7c and open the gate t' and allow the required quantity of lead to pass from the hopper into the space between the two gates, then close the upper gate 'L' and regulate the flow of lead to the pipe K by the lower gate 7c. The conduit G, tapered transversely, as shown in Fig. 2, opens into the chamber B in the form of a long narrow slit l, which extends from the bottom nearly to the top of said chamber, or is to be of sufficient length to cover any mold which may be applied to the carriage.

Vhen the plate is curved, as shown in Figs. ft and 5, I arrange within the case and in proper relation to the mouth Z of the conduit a rotary carriage provided with a back to support the plate, as shown, and by imparting to the said carriage reciprocating rotary motion on its aXis and to the conduit a blast of air and black-lead from the blower the surface of said plate can be coated in essentially the saine manner as a fiat one, hereinbefore described.

The operation of coating a mold with black lead by the aid of my machine may be thus described: The mold (represented at O in Figs. 2 and is applied to the carriage through the opening covered by the door h, (see Fig. 2,) and is secured to the said carriage by any suitable means. The door is then closed and fastened, so as to be practically airtight. The shaft F and blower II are neXt set in rcvo lution, and consequently the carriage F will be put in movement in a direction past the slit Z in the conduit G. As the plate nears the slit, a suitable quantity of the black-lead is admitted from the hopper to the pipe K, which on passing to the chamber D will be IOO drawn into the blower and forced from it with air into the conduit G, and through the same out the slit l and against the mold while it is passing the slit. It is intended to so gage the amount of black-lead admitted to the conduit that the iiow of it from the slit will cease to a large extent at the time that the mold has passed clear of the slit. The surplus of lead which did not adhere to the mold, being inconsiderable, will be blown through the conduit a into the chamber C, and after circulating therein will pass through the outlet b into the chamber D and be again drawn into the blower. The carriage, having` traversed the chamber B, will immediately return, and as the mold repasses the slit it will be subjected to additional pressure from a blast of air, which will securely embed the black-lead in the mold and polish the coated surface thereof. This operation can be repeated until the mold has received the requisite polish.

Instead of forming in the case separate chambers, as described, the entire interior of the case may be one chamber, thus doing away with the partitions and the conduit a and opening b, the ways c in this case being supported by the ends of the case.

The advantage of applying black-lead or plambago to molds for electrotypes, as hereinbefore described, is that it effects much saving in time over the methods usually employed for the purpose. The surface ismore perfectly coated, and the mold being inclosed in an air-tight case the black-lead cannot ily over the apartment in which the case is located, and the conduit G, having its mouth formed as shown, enables the necessary force or blast of air to be maintained and facilitates the depositing of the lead on the mold, it being blown against it with sufficient power to enter the smallest crevice, the mold being thoroughly coated in every part.

Having described my invention, what I claim, in a machine for coating with blacklead the molds for electrotypes, is-

l. The combination of the case provided with chambers having passages connecting blower-chamber having apipe to convey the black-lead to the blower, all being arranged and to operate essentially as set forth and represented.

2. The combination of the case provided with chambers and having arranged and supported therein a carriage connected with mechanism for imparting to said carriage reciprocating rectilinear movements therein for the purpose described, with the blast-blower arranged within said chamber and having a conduit to convey air mingled with blacklead forced by said blower into the conduit and through the slit Zwith sufficient force against the mold as it passes said slit to securely deposit a coating of the lead on the face of the mold, essentially,7 as set forth and represented. e

The conduit G, provided with the long narrow mouth or slit, as shown, to discharge air mingled with black-lead, forced into said conduit by the blower, into the case and against the mold, as described, in combination with the lcase having arranged therein the moldsustaining carriage provided with mechanism for imparting to it reciprocating rectilinear movements in front of said slit, the blower connected with the conduit G, also provided with mechanism for operating it, and the pipe K, opening into the chamber and provided with gates and a hopper, substantially as set forth and represented.

In testimony whereof I affix my signature in presence of two witnesses.

VARREN MILES. Vitnesses:

S. N. PIPER, EBER R. BUTLER. 

